:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --background-color: #f5f6fa;
    --text-color: #2c3e50;
    --border-color: #dcdde1;
    --land-color: #b0b0b0;
    --water-color: #e6f2fa;
    --land-color-night: #8a8a8a;
    --water-color-night: #cad4e0;
    --night-shade: rgba(44, 62, 80, 0.35);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

h1 {
    color: var(--primary-color);
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--secondary-color);
    font-size: 1.2rem;
}

#map-container {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
    overflow: hidden;
    width: 100%;
}

#map {
    width: 100%;
    height: 60vh;
    min-height: 400px;
    max-height: 600px;
    background: var(--water-color);
    display: block;
}

.land {
    fill: var(--land-color);
}

.land-night {
    fill: var(--land-color-night);
}

.terminator {
    stroke: #666;
    stroke-width: 2px;
    fill: none;
}

.night-region {
    fill: var(--night-shade);
    stroke: none;
}

.info-panel {
    display: grid;
    grid-template-columns: 1fr 1fr 2fr;
    gap: 2rem;
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.time-info {
    text-align: center;
}

.time-info h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

#current-time {
    font-size: 2rem;
    font-weight: bold;
    color: var(--secondary-color);
}

#current-date {
    color: var(--text-color);
    opacity: 0.8;
}

.date-picker {
    text-align: center;
}

.date-picker h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.date-controls {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

#date-picker {
    padding: 0.5rem;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    background: white;
    color: var(--text-color);
    transition: border-color 0.2s;
}

#date-picker:focus {
    outline: none;
    border-color: var(--secondary-color);
}

#date-picker.custom-date {
    border-color: var(--secondary-color);
    background: #f8f9ff;
}

.btn {
    padding: 0.5rem 1rem;
    background: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn:hover {
    background: #2980b9;
}

.btn-secondary {
    background: var(--primary-color);
}

.btn-secondary:hover {
    background: #1a252f;
}

.view-controls {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1rem;
}

/* Miniature maps grid */
.mini-maps-container {
    display: none;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 1rem;
    margin-bottom: 2rem;
}

#map-container.viewing-mini-maps #map {
    display: none;
}

#map-container.viewing-mini-maps #mini-maps-container {
    display: block;
}

.mini-maps-container.loading {
    display: block;
}

.loading-indicator {
    text-align: center;
    padding: 2rem;
    color: var(--secondary-color);
    font-size: 1.1rem;
}

.loading-indicator::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--secondary-color);
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s ease-in-out infinite;
    margin-left: 0.5rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.mini-maps-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.mini-maps-header h2 {
    color: var(--primary-color);
    margin: 0;
}

.close-mini-maps {
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-size: 0.9rem;
}

.mini-maps-grid {
    display: grid;
    gap: 0.25rem;
}

.mini-maps-grid.year-view {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
}

.mini-maps-grid.month-view {
    grid-template-columns: repeat(7, 1fr);
}

.mini-map-item {
    background: var(--water-color);
    border-radius: 4px;
    padding: 0.25rem;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

.mini-map-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    border-color: var(--secondary-color);
}

.mini-map-item h4 {
    margin: 0 0 0.25rem 0;
    font-size: 0.6rem;
    color: var(--primary-color);
}

.mini-map-svg {
    width: 100%;
    height: auto;
    aspect-ratio: 1.5;
    background: var(--water-color);
    border-radius: 2px;
    display: block;
}

.mini-map-svg .land {
    fill: var(--land-color);
    stroke: #fff;
    stroke-width: 0.3;
}

.mini-map-svg .land-night {
    fill: var(--land-color-night);
    stroke: #fff;
    stroke-width: 0.3;
}

.mini-map-svg .night-region {
    fill: transparent;
    stroke: none;
}

.mini-map-svg .terminator {
    stroke: #666;
    stroke-width: 1;
    fill: none;
}

.date-info {
    color: var(--text-color);
    opacity: 0.8;
    font-size: 0.9rem;
    margin: 0;
}

.explanation h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.explanation p {
    margin-bottom: 1rem;
}

footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

footer a {
    color: var(--secondary-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .info-panel {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    #map {
        height: 50vh;
        min-height: 300px;
        max-height: 400px;
    }
    
    .container {
        padding: 1rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .date-controls {
        flex-direction: column;
        align-items: center;
    }
    
    #date-picker {
        width: 100%;
        max-width: 200px;
    }
    
    .mini-maps-grid.year-view {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    
    .mini-maps-grid.month-view {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }
    
    .mini-map-svg {
        /* height is now controlled by aspect-ratio */
    }
}